Please contact Numark for warranty repair. https://www.numark.com/support/customer-care/us#:~:text=Contact%20us%20by%20Phone%3A%20401%2D658%2D3131
Please contact Cortek for Digitech Repairsdigitech@cortek.co.kr
Please contact DenonDJ https://www.denondj.com/support for warranty service
Important! Your manufacture doesn't cover No Problem Found. If we are unable to duplicate a problem you may be liable for diagnostics and return shipping (if applicable).